Originally posted by CX15 I will probably need 3 lenses for the K5:
1. Wide angle zoom (Choice between DA12-24/F4 and Sigma 10-20/F4-5.6)
2. Medium zoom (Choice between DA17-70/F4 and DA*16-50/F2.8)
3. Fast prime (Choice between a gazillion lenses, probably in the 21mm to 35mm range)
I will probably shoot with the K5 and my current DA17-70 first and see how that goes before deciding.
Three lenses is a start, heh heh. My original 3 were DA10-17, DA18-250, and FA50/1.4. The 10-17 is now mostly replaced by the Tamron 10-24. I suggest you think of the Tamron for your UWA, as its warranty is better than Pentax and its QC is better than Sigma. I won't express an opinion on medium zooms because I don't use'em -- my DA18-250 gives more than enough range. And a set of MF fast primes like 24/2, 28/2, 35/2, 50/1.4 won't be killer expensive.
Coverage: It's good to be able to cover 10-500mm with 3 lenses, or 10-100mm with 2 lenses, etc. But coverage isn't sufficient. It's good to have fast|agile lenses at critical focal lengths. That's why I have f/2s at 24-28-35-58-85mm, and the F35-70, and various Fifties, and other specialty lenses. And it's good to have lenses with special character, especially cheap ones. 'Coverage' lenses just don't have speed nor character.
Quote: Also, to keep cost down I might get a MF prime first and see what it's like - I haven't shot with a MF lens before, so a bit apprehensive...
MF ain't no big thang. AF is only about a generation old -- MF is traditional. [I won't rant about lazy kids who don't know how to focus.] MF is especially easy now with Focus Confirmation and CIF. My delaminating eyeballs depend on such focus aids. Many good old MF primes can still be bought for the price of one new AF prime. My minimalist ultralight minikit (Enna 35 and 100 f/4.5, CZJ Tessar 50/2.8, all easily adapted to PK mount) weighs 300g total and cost under US$30 shipped. Bargains still abound. Perseverance is all you need.